goedon



(No Model.)

F. W. GORDON. DUST GATGEER PUB, BLAST FURNACES. No. 381,774.

Patented Apr. 24, 1888.

- M JNIV/ENTORI- ATTORNEY.

3 N a I M Q UNITED STATES PATENT Erica.

FRED. W. GORDON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO GORDON,STROBEL & LAUREAU, OF SAME PLACE.

DUST-CATCHER FOR BLAST-FURNACES.

SPECIFICATION forming part of Letters Patent No. 381,774, dated April24, 1888.

Application filed August 1, 1887. Serial No. 245,795. (No model.)

To all whom it may concern:

Be it known that I, FRED. W. GORDON, of Philadelphia, Philadelphiacounty, Pennsyl Vania, have invented certain new and usefulImprovementsin DustOatehers for Blast-Furnaces, ofwhich the following isa'speciflcation. Gas flowing from blast-furnaces contains much dust,&c., which it is desirable to intercept before being carried to thehorizontal com [o duits, where it isliable to accumulate and do nectionwith the accompanying drawings, in

which- 7 Figure l is avertical longitudinal section of a blast'furnacehaving its outlet gas-pipeprovided with my improved dust-catcher,thedustzo catcher appearing, in this View, in elevation;

and Fig. 2, a vertical horizontal section of the dust-catcher, takenupon a plane at right augles to theplane of Fig. 1, this view being upona somewhat enlarged scale.

2 In the drawings, A indicates a blast-furnace;

B, the usual downeorner, through which the gas is conveyed from the topof the furnace downward to the gasmain; O, the usual dustcatchingchamber at the foot of this downcomer-,this chamber beingas usual,anenlargement at the foot of the downcomer and provided atits base withthe usual discharge-valve for accumulated dust from the chamber; D, theusual gas-main leading from the chamber off to points of consumption ofthe gas; E, thelower end of the downeomer projecting downward into thedust-catching chamber 0; F, two outlet-pipes leading from thedust-catching chamber O, above the level of the lower end of theprojection E,into communication with the gas main D; G, a pair ofannular deflecting-rims suspended below the mouth of the projection E,one rim below the other, each rim having the form of the frustum of acone with the 4 large end upward, thelarger diameters of the rim beinglarger than the projection E and smaller than the chamber 0, one rimbeing disposed a short distance below the mouth of the projection E, andthe other rim a short distance below the first rim, the rims beingsustained in position, in the illustration, by suspensionbars secured tothe rims and to the projection E; H, theannular spaces betweentheperipheries of the rims and the interior of the chamher 0; and J theannular spaces just within the peripheries of the rims, the upper onebetween the upper rim and the lower edge of the projection E and thelower one between the walls of the two rims.

The dust-laden gas descending the down comer B enters the chamber (3,and is deflected upward and finds its way to the gas main through theoutlets F. As the gas leaves the lower end of the downcomer at the footof the projection E, its flow becomes checked by reason of the lessenedarea at the bottom of the upper rim. The consequence is that a portionof the gas will be deflected upward at once by the interior surface ofthe upper rim, and will pass upward through the upper passage J, andfind its way thence to the outlet-pipes F. The gas which thus finds itsway upward has been sharply deflected by contact with the interior ofthe upper rim, and its heavier impurities will have proceeded ondownward into thebottom of the dust-catching chamber. The gas which hasnot been thus deflected upward by means of the upper rim will pass outof the upper rim, and a portion of it will be deflected upward by theinterior of the lower rim and will find its way upward through the lowerpassage J, the balance of the gas, together with the heavier dust,passing through the bottom of the lower rim to the lower portion of thedust-chamber, where it becomes deflected upward by the bottom of thechamber, the gas passing upward to the outletpipes F through the annularpassage H, the upward annular stream striking against the outer inclinedlower surface of the rims, which deflect the heavier mattersdownwardinto the dustcatcher. There being two of the outlet-pipes Fleading from the dust catching chamber, the upward flow of gas-becomesfairly distributed, so as to utilize the deflecting properties of theentire surface of the rims.

The gas main D is illustrated as beinglocated above the dust-catchingchamber, the outletpipes F leading upwardly from the chamber to thegasmain. If the gas-main be located below the dust-chamberas,forinstance, when the gas-main is underground, as is very com- 1non-theoutlet-pipes F will of course lead downwardly to the gas-main. In eitherevent it is essential to my improvement that the outlets F leadoutwardly horizontally from the chamber at points above the lower end ofthe downcomer.

I claim as my invention- In a dust catcher, the combination,substantiall y as set forth, of a dust-catching chamber,

FRED. W. GORDON.

Witnesses:

JNO. TAYLOR, LOUIS M. WAGNER.

